.pst files (and sometimes imports data into a mailbox connected to Microsoft 365/Exchange). Because these formats are built differently, a direct “copy and open” approach does not work reliably. That’s where an OLM to Outlook Converter software becomes essential for safe and accurate migration. https://hallbook.com.br/blogs/844695/OLM-to-Outlook-Converter-Software-for-Safe-Accurate-Migration